package com.ssyt.yt1.day18.map;

import java.util.HashMap;
import java.util.Map;

/**
 * <pre>
 * 如果把自定义当作HashMap的key需要，把这个自定义对象重写equals和hashCode方法
 * </pre>
 * 
 * @author Administrator
 *
 */
class Person {

	private int id;
	private String name;
	private int age;

	public Person() {
		super();
	}

	public Person(int id, String name, int age) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + age;
		result = prime * result + id;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Person other = (Person) obj;
		if (age != other.age)
			return false;
		if (id != other.id)
			return false;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		return true;
	}

}

public class HashMapDemo2 {

	public static void main(String[] args) {
		Map<Person, String> map = new HashMap<>();
		map.put(new Person(1, "zs", 18), "13333333333");
		map.put(new Person(1, "zs", 18), "13333333333");
		System.out.println(map);
	}
}
